Process for preparing steel of high grade from ordinary iron.



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ADAM. MASSOTT, in, or MD'UTTERSTADT, GERMANY, Assienon TO FRITZ ANDRE-OF HAARDT,

- NEAR NEUSTADT /H, GERMANY.

PROCESS FQIR PREilARING STEEL OF HIGH GRADE ORDINAlhY IRON.

Specification of Letters Pateiit.

Patented July 30,1907.

Original application filed January 23, 1906, Serial No. 297,530. Divided and this application filed September 21, 1906.

' Serial No. 335,608. r

To all whom it may concern; I

Be it known that I, ADAM Mi-isso'r'r, 'Jr.,'merchant, a subject of the King of Bavaria, and a citizen of the G ernian Empire, residing at Mutterstadt, in the Palatinate, Germany, have invented certain new and useful Iniproveinents 'in Processes for Preparing Steel of High Grad e i'i om Ordinary Iron; and he does hereby declare the following to be a lull, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperiains to make and use the same.

This invention relates to a process for preparing steel of high grade from ordinary iron and inferior grades of steel, and is a division of pending application, Serial Number 297,530, iiled January 23, 1906, for

manufacture of ste l from ordinary iron, and in response to the requirement of the Patent Oflice made in such pending application under date of March 1.2, 1906.

The object of the invention is to provide from ordinary iron and inferior grades of steel, a high grade of steel possessing substantially the qualities of the best crucible steel and possessing marked economy in the cost of materials and labor employed.

in carrying out the process, forming the subject inattcrol this application, the iron to be converted is packed inn retort in and in immediate contact. with a powder composed of the following ingredients iii substantially the proportions named-by wright, to wit-300 parts yellow Ierrocya'nid oi potassium, 200 parts size prepared from leathewparings, 200 parts powdered charcoal, 180 parts colophony, 20 parts soda, and parts finely screened earth.

While the proportions above given are found from experiment and experience to he those hcst adapted for producing the highest grad e of steel with the least expenditure of labor, it is obvious that the exact proportions may be somewhat varied Without. departing iroin the spirit oi the invention.

The retort in which the iron and the component powder are packed is of any approved and convenient form and arranged to be closed hermetically and when i so packed and closed, the retort audits contents, are heated in any convenient and approved manner to a white heat or incandescencc, at which heat it is maintained for approximately live hours, unless it is desired to only partiallyconvert the iron mass by forming a steel outer surface with a soft iron inner core, in which case the time required is lessened. I

It is found that 2 parts of the powder by weight is required for 7 parts by weight of the metal, and when heated, as described, for the length of time mentioned, the retort, with its contents, is permitted to cool without opening, whereby the steel therein contained andpacked inthe powder is prevented from becoming misshapenod or warped by the heating or cooling process, and is cooled in exactly the same shape in which it was inserted in the retort.

WhatI claim is iron and inferior grades of steel consisting in heating the metal in an air tight retort to a white hentiin contact with a material composed of icrrocyanid o potassium, charcoal powder, colophony, soda, finely screened earth and size made from leather pill'iligs.

.2. The process of nianui'rmturlira, steel from ordinary iron and inferior grades of steel consisting in limiting the in an tllldiig'lll. retort to a white heat and in contact with the material in powdered form colilposod by weight substantially of 2400 parts i'errocv-iuikl oi. pol; slum, :oo parts size made from leather pariir zoo parts powd red charcoal, 18 parts colophony, 20 parts soda. and in parts finely screened earth In testimony whereof, I atllx my signature, in presence 'ot. two witnesses.

ADAM MASSOF'I, .lllN.

Witnesses ll. \V. lLuzuis.

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